Hi :-), At first thank you for your detailed comments about this task, i'm trying to answer every point, please alert me if I miss one :-). @add extensibility to jpdl schema Althought I like the idea of an extendable schema for jpdl,I suspect this task is a bit of to much for our purpose, extending the schema means extending jpdl, which itself means extending the jpdl-core-engine. Since we want to use jbpm because of it's current stability, a modification of the engine itself should be avoided, because it holds a great danger for nasty bugs, which could be avoided by the "custom node approach". (Second approach noted by Ronald). I would prefer this approach because it looks like the easiest way to achieve extendebility. I would change my opinion if there are good arguments for doing that ;). @BPMN2 I have to read more about it .... although I would propose to use an already existing node-type (java or custom), a new "service"-node would be acceptable for me. @specific node fuctionality I'm not quite shure what you mean with "generic", although we need a domain specific representation of our nodes (a stupid User should be able to differentiate two different "action-types" by sight ), It would be absolutly sufficient if those two different "action-types" are representated by the same node-type on xml-level. And at last I suppose that there should be a generic approach for adding such action-types. @eclipse development My knowledge of eclipse-plugin-developement is quite limited, I know the concept of an extension point, but I wouldn't be able to define one, but this can be changed ;). @timeline We are calculating with about two days for jbpm-developement per week, starting with evaluating the basics and targets in september. Active programming could start in october, hoping about first eyecatchers in november and a nearly working solution in december .... But that's only a rough calculation .... more time could be afforded if it is needed .... Thank you for your comments and your time, Jan P.S. I will configure and co the svn in the next days and cry for your help if I can't manage that :-) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4254224#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...